# Nitrox Buddy vs Dive Converter

The clearest difference is price: Nitrox Buddy at Free against Dive Converter's $1.99. Nitrox Buddy also leads on rating (4.9 vs 4.0) and review sentiment (96% vs 67%). Dive Converter's advantage is in-app purchases (none vs 1) and update cadence (every 2 months vs every 7 months). On ads and device support there is nothing between them.

Nitrox Buddy is free to download; Dive Converter costs $1.99 up front. Nitrox Buddy sells 1 one-off in-app purchase. Dive Converter asks for nothing beyond the download.

Nitrox Buddy holds the better App Store score, 4.9 against 4.0. That said, the two scores are not equally well evidenced: Nitrox Buddy has 468 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 96% of Nitrox Buddy's written reviews are positive against 67% of Dive Converter's.

Nitrox Buddy ships an update every 7 months, Dive Converter every 2 months. The most recent releases landed on October 14, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Nitrox Buddy | Dive Converter |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.9 (468 ratings)](https://appshunter.io/ios/app/nitrox-buddy/id572411073/reviews)** | [4.0 (5 ratings)](https://appshunter.io/ios/app/dive-converter/id6446218356/reviews) |
| Number of ratings | **468** | 5 |
| Positive reviews | **95.7% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | — | **#39** |
| Size | 6 MB | 9 MB |
| Requires iOS | 26.0 | **18.6** |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Gereon Steffens](https://appshunter.io/developer/493030228) | [Carsten Heinelt](https://appshunter.io/developer/1676741637) |

## What reviewers say

### Nitrox Buddy

[App page](https://appshunter.io/ios/app/nitrox-buddy/id572411073)

This application serves as a straightforward calculator for nitrox and enriched air divers. It quickly computes essential dive data such as Maximum Operating Depth (MOD), Equivalent Air Depth (EAD), Best Mix, and Partial Pressure of Oxygen (PPO2). It supports both imperial and metric units and offers a companion watch app for on-the-go calculations.

**Highlights:** Calculate MOD, EAD, Best Mix, PPO2, Imperial and metric unit support, Sea and fresh water options, Selectable max oxygen content, Selectable max partial pressure, Companion watch app

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tip | $0.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Quick calculations
- ✅ Accurate results
- 💡 Free to use
- 🎯 Essential for Nitrox divers

**What reviewers complain about**

- 📱 Ugly iPad icon
- ⚠️ MOD calculation limited to 40% O2 in older versions
- ⚠️ MOD calculation limited to 50% O2 in older versions
- ⚠️ Needs to work with older iOS versions

**Reported bugs**

- iPad icon is ugly
- MOD limit of 50% O2 despite 100% O2 setting (resolved)
- MOD limit of 40% O2 (older version)
- Does not work with older iOS versions

**Requested features**

- Add MOD 1.5 option
- Allow MOD calculation up to 100% O2 and indicate max exposure duration
- Change color for inappropriate mixes (e.g., 50% at 40m)
- Support older iOS versions (5 & 6)


### Dive Converter

[App page](https://appshunter.io/ios/app/dive-converter/id6446218356)

**Currently charting:** #39 Top Paid · Sports (US App Store)

Easily export your dive logs from Oceanic+ and SSI/mares into the Universal Dive Data Format (UDDF). This app translates dive information accurately and supports importing third-party UDDF files. It also offers features like reverse geocoding for dive locations and surface time calculation.

**Highlights:** Export Oceanic+ and SSI/mares dives to UDDF, Reverse geocoding for dive locations, Calculate surface time, Backup and restore dives, Import third-party UDDF files, Filter and merge dives

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Nitrox Buddy free?

Nitrox Buddy is free to download, with in-app purchases available.

### Is Dive Converter free?

Dive Converter costs $1.99, with no in-app purchases.

### Which has better reviews, Nitrox Buddy or Dive Converter?

Nitrox Buddy is rated higher. Nitrox Buddy averages 4.9 out of 5 from 468 ratings, while Dive Converter averages 4.0 from 5 ratings.

### Do Nitrox Buddy or Dive Converter have ads?

Neither Nitrox Buddy nor Dive Converter shows ads.

### Which is updated more often, Nitrox Buddy or Dive Converter?

Nitrox Buddy ships an update every 7 months, and Dive Converter every 2 months. Most recently, Nitrox Buddy was updated on October 14, 2026 and Dive Converter on October 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*